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The incremental interface now passes the old metrics when asking for

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replacement metrics so that they can be modified, not just replaced.
For example, CFF fonts need this.
This commit is contained in:
Graham Asher 2003-02-13 17:49:27 +00:00
parent 3c3b2be67c
commit 46960df7b3
5 changed files with 96 additions and 83 deletions
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19
include/freetype/ftincrem.h
View File

@ -174,21 +174,22 @@ FT_BEGIN_HEADER
* vertical ::
* If true, return vertical metrics.
*
* ametrics ::
* This parameter is used for both input and output.
* The original glyph metrics, if any, in font units. If metrics are
* not available all the values must be set to zero.
*
* @output:
* ametrics ::
* The glyph metrics in font units.
*
* afound ::
* True if there are metrics at all.
* The replacement glyph metrics in font units.
*
*/
typedef FT_Error
(*FT_Incremental_GetGlyphMetricsFunc)
( FT_Incremental incremental,
FT_UInt glyph_index,
FT_Bool vertical,
FT_Incremental_MetricsRec *ametrics,
FT_Bool *afound );
( FT_Incremental incremental,
FT_UInt glyph_index,
FT_Bool vertical,
FT_Incremental_MetricsRec *ametrics );
/**************************************************************************

23
src/cff/cffgload.c
View File

@ -2363,6 +2363,29 @@
cff_builder_done( &decoder.builder );
}
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* Incremental fonts can optionally override the metrics. */
if ( !error &&
face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->get_glyph_metrics )
{
FT_Incremental_MetricsRec metrics;
metrics.bearing_x = decoder.builder.left_bearing.x;
metrics.bearing_y = decoder.builder.left_bearing.y;
metrics.advance = decoder.builder.advance.x;
error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
glyph_index, FALSE, &metrics );
decoder.builder.left_bearing.x = metrics.bearing_x;
decoder.builder.left_bearing.y = metrics.bearing_y;
decoder.builder.advance.x = metrics.advance;
decoder.builder.advance.y = 0;
}
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
font_matrix = cff->top_font.font_dict.font_matrix;
font_offset = cff->top_font.font_dict.font_offset;

22
src/cid/cidgload.c
View File

@ -89,7 +89,7 @@
else
#endif
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
/* For ordinary fonts read the CID font dictionary index */
/* and charstring offset from the CIDMap. */
@ -162,23 +162,21 @@
face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->get_glyph_metrics )
{
FT_Bool found = FALSE;
FT_Incremental_MetricsRec metrics;
metrics.bearing_x = decoder->builder.left_bearing.x;
metrics.bearing_y = decoder->builder.left_bearing.y;
metrics.advance = decoder->builder.advance.x;
error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
glyph_index, FALSE, &metrics, &found );
if ( found )
{
decoder->builder.left_bearing.x = metrics.bearing_x;
decoder->builder.left_bearing.y = metrics.bearing_y;
decoder->builder.advance.x = metrics.advance;
decoder->builder.advance.y = 0;
}
glyph_index, FALSE, &metrics );
decoder->builder.left_bearing.x = metrics.bearing_x;
decoder->builder.left_bearing.y = metrics.bearing_y;
decoder->builder.advance.x = metrics.advance;
decoder->builder.advance.y = 0;
}
#endif
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
Exit:
return error;

91
src/truetype/ttgload.c
View File

@ -808,42 +808,33 @@
FT_Short left_bearing = 0;
FT_UShort advance_width = 0;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
FT_Bool metrics_found = FALSE;
Get_HMetrics( face, glyph_index,
(FT_Bool)!( loader->load_flags &
FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
&left_bearing,
&advance_width );
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* If this is an incrementally loaded font see if there are */
/* overriding metrics for this glyph. */
if ( face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->get_glyph_metrics )
{
FT_Incremental_MetricsRec m;
FT_Incremental_MetricsRec metrics;
metrics.bearing_x = left_bearing;
metrics.bearing_y = 0;
metrics.advance = advance_width;
error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
glyph_index, FALSE, &m, &metrics_found );
glyph_index, FALSE, &metrics );
if ( error )
goto Exit;
left_bearing = (FT_Short)m.bearing_x;
advance_width = (FT_UShort)m.advance;
left_bearing = (FT_Short)metrics.bearing_x;
advance_width = (FT_UShort)metrics.advance;
}
if ( !metrics_found )
Get_HMetrics( face, glyph_index,
(FT_Bool)!( loader->load_flags &
FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
&left_bearing,
&advance_width );
#else
Get_HMetrics( face, glyph_index,
(FT_Bool)!( loader->load_flags &
FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
&left_bearing,
&advance_width );
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
loader->left_bearing = left_bearing;
@ -1326,7 +1317,6 @@
exec->is_composite = TRUE;
exec->pedantic_hinting =
(FT_Bool)( loader->load_flags & FT_LOAD_PEDANTIC );
error = TT_Run_Context( exec, ((TT_Size)loader->size)->debug );
if ( error && exec->pedantic_hinting )
goto Fail;
@ -1449,33 +1439,9 @@
FT_Pos left; /* scaled vertical left side bearing */
FT_Pos top; /* scaled vertical top side bearing */
FT_Pos advance; /* scaled vertical advance height */
FT_Bool metrics_found = FALSE;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* If this is an incrementally loaded font see if there are */
/* overriding metrics for this glyph. */
if ( face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->get_glyph_metrics )
{
FT_Incremental_MetricsRec m;
FT_Error error =
face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
glyph_index, TRUE, &m, &metrics_found );
if ( error )
return error;
top_bearing = (FT_Short)m.bearing_y;
advance_height = (FT_UShort)m.advance;
}
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
/* Get the unscaled top bearing and advance height. */
if ( !metrics_found && face->vertical_info &&
if ( face->vertical_info &&
face->vertical.number_Of_VMetrics > 0 )
{
/* Don't assume that both the vertical header and vertical */
@ -1516,8 +1482,35 @@
}
}
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* If this is an incrementally loaded font see if there are */
/* overriding metrics for this glyph. */
if ( face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->get_glyph_metrics )
{
FT_Incremental_MetricsRec metrics;
FT_Error error = 0;
metrics.bearing_x = 0;
metrics.bearing_y = top_bearing;
metrics.advance = advance_height;
error =
face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
glyph_index, TRUE, &metrics );
if ( error )
return error;
top_bearing = (FT_Short)metrics.bearing_y;
advance_height = (FT_UShort)metrics.advance;
}
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
/* We must adjust the top_bearing value from the bounding box given */
/* in the glyph header to te bounding box calculated with */
/* in the glyph header to the bounding box calculated with */
/* FT_Get_Outline_CBox(). */
/* scale the metrics */

24
src/type1/t1gload.c
View File

@ -76,7 +76,7 @@
glyph_index, char_string );
else
#endif
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
/* For ordinary fonts get the character data stored in the face record. */
{
@ -95,23 +95,21 @@
if ( !error && face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->get_glyph_metrics )
{
FT_Bool found = FALSE;
FT_Incremental_MetricsRec metrics;
metrics.bearing_x = decoder->builder.left_bearing.x;
metrics.bearing_y = decoder->builder.left_bearing.y;
metrics.advance = decoder->builder.advance.x;
error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
glyph_index, FALSE, &metrics, &found );
if ( found )
{
decoder->builder.left_bearing.x = metrics.bearing_x;
decoder->builder.left_bearing.y = metrics.bearing_y;
decoder->builder.advance.x = metrics.advance;
decoder->builder.advance.y = 0;
}
glyph_index, FALSE, &metrics );
decoder->builder.left_bearing.x = metrics.bearing_x;
decoder->builder.left_bearing.y = metrics.bearing_y;
decoder->builder.advance.x = metrics.advance;
decoder->builder.advance.y = 0;
}
#endif
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
return error;
}
@ -137,7 +135,7 @@
face->root.internal->incremental_interface->object,
&glyph_data );
}
#endif
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
return error;
}